I also have this problem with Instinct-NX and Oled with Samsung Evo Plus 512gb Sd card. With Sandisk it works fine. Did you use the flat cable to install the chip?
I went to a garage sell last saturday, and the lady had a PS2 for sale, but she had a sign on it that said "Nintendo -$50", had to laugh, almost bought but she didn't know if worked, and she didn't have controller or cables, so I passed.
@BigOnYa:
I went to a garage sell last saturday, and the lady had a PS2 for sale, but she had a sign on it...